Other
Scientific paper
Aug 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003basbr..23..101d&link_type=abstract
Boletim da Sociedade Astronômica Brasileira (ISSN 0101-3440), vol.23, no.1, p. 101-102
Other
Scientific paper
An important way to understand the evolution of the Herbig Ae/Be (HaeBe) stars is to study their chemical composition. The metallicity usually adopted for the young stars is the one of the Sun, but the few studies done for these stars indicates that this hypothesis is probably incorrect for many of the regions where star formation has recently occurred. We obtained high resolution, high S/N spectra for a sample of HAeBe stars using the FEROS spectrograph (ESO). The sample is composed of previously known HAeBe stars and of stars classified as HAeBe by the "Pico dos Dias Survey" (a search for young stellar objects). No information about metallicity or chemical composition was available for most of these stars. We present the first results of the spectroscopic analysis of the sample: effective temperatures were derived from the spectral type and from the fitting of Hg profiles. In addition, from the analysis of the iron lines, we determined effective temperature, surface gravity, metallicity and microturbulence velocity. Abundances of other elements which lines are present in the spectra are determined by spectral synthesis. Based only in the sample already analyzed we found that, within the errors, the [Fe/H] values do not deviate much from the Solar one. The observed abundance pattern, however, may be related to the location of these objects.
Castilho Bruno V.
Daflon Simone
Sartori Marilia J.
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